VIDEO: Lily Pregnant? Baby Talk with Mother's Alyson Hannigan

"It's definitely something that they're thinking about, but it would definitely limit the amount of bar scenes Lily can be in," Alyson Hannigan tells TVGuide.com. "I will say they do eventually have children. We just don't know when."

But viewers will get a hint of a bundle of joy to come on Monday's episode (8/7c, CBS) when the gang attempts to quit smoking. "There is a mention that I quit smoking when we start trying to get pregnant," the actress teases.In real life, Hannigan, 35, has an 8-month-old daughter, Satyana, and calls motherhood "the best thing I've ever done."